In the rest of the paper, the elliptic complex (REF ) will be called the Salamon's complex because it was first constructed by S. Salamon in [1]} together with several other elliptic complexes, which may not exist globally. Another class of elliptic complexes on quaternionic manifolds was described by R. Baston in [2]}. Recently, A. Čap and V. Souček applied the theory of parabolic geometries to construct a wide class of complexes of differential operators as subcomplexes in the so-called curved BGG-sequences, see [3]}, and many of them turned out to be elliptic. We will describe these complexes in a convenient way without giving their explicit construction. This can be found in [3]}, the theory of BGG-sequences in [5]} and the general theory of parabolic geometries in [6]}.
